package com.atjinggu.jinggumail.member.exception;

/**
 * @author jingming
 * @Type UsernameExistException.java
 * @Desc
 * @date 2021/3/1 18:08
 */
public class UsernameExistException extends RuntimeException{
    public UsernameExistException() {
        super("用户名已存在");
    }
}